The value of the attribute is defined to be one of a list of possible
values but in the document it contained something that is not allowed
for that type of attribute. For instance, the “selected
” attribute must be either
minimized as “selected
”
or spelled out in full as “selected="selected"
”; a value like
“selected="true"
” is not
allowed.
textexample textexample
textexample textexample